A large number of websites went down early Tuesday, including many tied to Cloudflare, a web security company that provides services like protection against DDoS attacks. Websites and apps including Discord, Medium, Coinbase, Grindr, and DoorDash all appeared to be delivering errors early Tuesday, according to Down Detector.

Users may experience errors or timeouts reaching Cloudflare’s network or services. We will update this status page to clarify the scope of impact as we continue the investigation,” the statement continued.

Cloudflare’s blog even delivered a “500 internal server error” on Tuesday.

Other websites with issues appear to be League of Legends, Crunchyroll, and Mediacom, according to Down Detector.